China Reference Works Online (CRWO) / 中国工具书网络出版总库
A searchable database of Chinese atlases, encyclopedias, handbooks, thesauruses and dictionaries, with 1,460 titles and 8 million entries included.
Compiled by Benjamin A. Elman in Princeton and his team
Duxiu Knowledge Search Database / 读秀图书搜索
Provides access to more than 3 million Chinese bibliographic entries and 2 million full text scholarly resources in all subjects and formats.